Sorry, LOGO doesnt have any undo command, so you will have to do everything over : (
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Oh, dude, it's like super easy. To undo on MSW Logo, you just need to press Ctrl + Z on your keyboard. It's like magic, but not really. Just a simple shortcut to undo your last action. So, no need to stress about making mistakes in your turtle graphics masterpiece.
To undo an action in MSW Logo, you can use the "UNDO" command. This command allows you to reverse the most recent action you performed in the Logo programming environment. Simply type "UNDO" and press Enter to revert the last action you took, such as drawing a line or executing a specific command. This feature is helpful for correcting mistakes or experimenting with different ideas in your Logo programming projects.
Listen up, honey. To undo on MSW Logo, you can simply press "Ctrl + Z" on your keyboard. It's like a magical little shortcut that erases your last move. So next time you mess up your masterpiece, just hit those keys and voilà, you're back in business.
No undo command but there are still other things you can do
use pen erase "pe". pe turn the turtle into eraser.
if you want to undo a drawing fd 100
you can erase by the below command
pe bk 100